Search Unity

Audio I can't find a working way to capture the microphone input volume (2019.1)

Discussion in 'Audio & Video' started by ArnoBen, May 16, 2019.

  1. ArnoBen

    ArnoBen

    Joined:
    Apr 24, 2019
    Posts:
    7
    Greetings,
    I've been looking for 1 hour on how to get the mic input volume but every single solution I found does not work for some reason.
    The most popular script by far is this one :

    Code (CSharp):
    1. using System.Collections;
    2. using System.Collections.Generic;
    3. using UnityEngine;
    4. public class MicInput : MonoBehaviour {
    5.         public static float MicLoudness;
    6.         private string _device;
    7.         //mic initialization
    8.         void InitMic(){
    9.             if(_device == null) _device = Microphone.devices[0];
    10.             _clipRecord = Microphone.Start(_device, true, 999, 44100);
    11.         }
    12.         void StopMicrophone()
    13.         {
    14.             Microphone.End(_device);
    15.         }
    16.         AudioClip _clipRecord = new AudioClip();
    17.         int _sampleWindow = 128;
    18.         //get data from microphone into audioclip
    19.         float  LevelMax()
    20.         {
    21.             float levelMax = 0;
    22.             float[] waveData = new float[_sampleWindow];
    23.             int micPosition = Microphone.GetPosition(null)-(_sampleWindow+1); // null means the first microphone
    24.             if (micPosition < 0) return 0;
    25.             _clipRecord.GetData(waveData, micPosition);
    26.             // Getting a peak on the last 128 samples
    27.             for (int i = 0; i < _sampleWindow; i++) {
    28.                 float wavePeak = waveData[i] * waveData[i];
    29.                 if (levelMax < wavePeak) {
    30.                     levelMax = wavePeak;
    31.                 }
    32.             }
    33.             return levelMax;
    34.         }
    35.         void Update()
    36.         {
    37.             // levelMax equals to the highest normalized value power 2, a small number because < 1
    38.             // pass the value to a static var so we can access it from anywhere
    39.             MicLoudness = LevelMax ();
    40.         }
    41.         bool _isInitialized;
    42.         // start mic when scene starts
    43.         void OnEnable()
    44.         {
    45.             InitMic();
    46.             _isInitialized=true;
    47.         }
    48.         //stop mic when loading a new level or quit application
    49.         void OnDisable()
    50.         {
    51.             StopMicrophone();
    52.         }
    53.         void OnDestroy()
    54.         {
    55.             StopMicrophone();
    56.         }
    57.         // make sure the mic gets started & stopped when application gets focused
    58.         void OnApplicationFocus(bool focus) {
    59.             if (focus)
    60.             {
    61.                 Debug.Log("Focus");
    62.                 if(!_isInitialized){
    63.                     Debug.Log("Init Mic");
    64.                     InitMic();
    65.                     _isInitialized=true;
    66.                 }
    67.             }  
    68.             if (!focus)
    69.             {
    70.                 Debug.Log("Pause");
    71.                 StopMicrophone();
    72.                 Debug.Log("Stop Mic");
    73.                 _isInitialized=false;
    74.             }
    75.         }
    76.     }
    But as soon as I paste it, I get an error on the line 16 because there are no AudioClip constructor that doesn't take arguments.
    I have tried to simply remove the "= new AudioClip()" part and the Microphone.MicLoudness is just gibberish, it absolutely doesn't reflect my microphone volume, and yes I am sure I'm using the right microphone, it's the default one. I don't even know if it's because of the AudioClip() error. Is this related to 2019.1 ?

    Thank you in advance for any help, it's becoming frustrating to take this long for what seems to be an absolutely trivial need.
     
  2. ArnoBen

    ArnoBen

    Joined:
    Apr 24, 2019
    Posts:
    7
    Ok so it appears that the problem comes from the fact that I'm using Google Cloud Speech recognition which gets in conflict with this script getting the microphone. I now have to find out how to get the mic volume inside this mess...

    Also, without GCSpeechRecognition it works fine when I simply remove the "= new AudioClip()" part.
     
    marief_unity likes this.